The third and final independent report triggered by the so-called climategate emails will be published today.

More than 1,000 hacked emails from a server at the University of East Anglia's climatic research unit were seized upon by climate change sceptics when they were published last November in the run-up to the Copenhagen climate summit.

The emails revealed scientists speaking in scathing terms about their critics, discussing ways to stonewall sceptics and talking about how to exclude opponents from peer-reviewed journals.

The emails, spread across 13 years, were used by critics to portray climate scientists as manipulating the data to back up the theory of manmade global warming.

Sir Muir said in February that his panel would examine whether there was any evidence that scientists at the CRU had doctored or suppressed data, perverted the peer review process or improperly blocked freedom of information requests.

Specifically the review has examined whether emails about tree-ring measurements and references to a "trick" to "hide the decline" amounted to manipulation.

One of the original panel members, Philip Campbell, was forced to resign after it emerged he gave an interview defending researchers at the centre.